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Title: Calculate the molar enthalpy of combustion for methanal #13 Post by: aliduck on Nov 19, 2017 Calculate the molar enthalpy of combustion for methanal, CH2O(l), if 47.5
kJ of energy is transferred when 2.50 g of methanal is burned in a calorimeter. (3 Marks) Title: Re: Calculate the molar enthalpy of combustion for methanal #13 Post by: bolbol on Nov 19, 2017 Molar mass of methanol, CH3OH = 12+3+16+1 = 32g/mol
Moles in 2.50g of methanol, CH3OH = 2.5g/32g/mol = 0.078125mol The molar enthalpy of combustion for methanol = 47.5kJ/0.078125mol = 608kJ/mol If you are satisfied with the answer, please mark it solved. Title: Re: Calculate the molar enthalpy of combustion for methanal #13 Post by: arvind1 on Jul 24, 2021 It is methanal not methanol. the answer is -570.57 kJ because it is being transferred to the water.
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